Charging system, charger, and electronic device

Abstract

The application discloses a charging system, a charger and an electronic device. The charging system comprises a charger and an electronic device. The charger comprises a first charging circuit, a first switch and a charging control circuit. The electronic device comprises a second charging circuit and a battery. The second charging circuit comprises a second power supply, a first detection module and a discharge control module. In the case that the first detection module detects that a first voltage value is equal to a first preset voltage value, the first switch is turned on by the charging control circuit, so that the first charging circuit is in communication with the first power supply through the first switch, and the charger charges the electronic device. In the case that the charging control circuit detects that a second voltage value is greater than a second preset voltage value, the first switch is turned off by the charging control circuit, so that the second end of the first charging circuit is disconnected from the first power supply, and the first power supply stops supplying power to the charger.

Description

Technical Field

[0001] This application belongs to the field of electronic technology, specifically relating to a charging system, charger, and electronic device. Background Technology

[0002] With the development of mobile communication technology, mobile terminals such as mobile phones, tablets, and personal digital assistants are becoming increasingly popular, bringing great convenience to people's lives, studies, and work. Connecting a charger to a socket and then to an electronic device allows the charger to charge the device. Once charging is complete, most users simply remove the device from the charger, disconnecting it from the charger while leaving the charger connected to the socket. However, when the charger is connected to the socket but not charging an electronic device, its input remains connected to the AC power grid, placing it in a near-no-load, low-power operating state. In this state, interference or lightning strikes to the AC power grid can cause harmonics and damage to the charger, reducing its lifespan. Summary of the Invention

[0003] This application aims to provide a charging system, charger, and electronic device to solve the problem in the related art that when the AC power grid is interfered with or struck by lightning, the charger in low-power operation will be impacted.

[0004] In a first aspect, embodiments of this application propose a charging system, including a charger and an electronic device;

[0005] The charger includes a first charging circuit, a first switch, and a charging control circuit. A first terminal of the first charging circuit is connected to a first power source, and a second terminal of the first charging circuit is connected to the first power source through the first switch. A first terminal of the charging control circuit is connected to the first charging circuit, and a second terminal of the charging control circuit is connected to the control terminal of the first switch. The charging control circuit is used to control the first switch to be turned on or off.

[0006] The electronic device includes a second charging circuit and a battery. The second charging circuit includes a second power supply, a first detection module, and a discharge control module. A first terminal of the second power supply is connected to the charging control circuit. A second terminal of the second power supply is connected to a first terminal of the first detection module. A second terminal of the first detection module is connected to a first terminal of the discharge control module. A second terminal of the discharge control module is connected to the battery. The battery is connected to the first charging circuit.

[0007] When the first detection module detects that the first voltage value is equal to the first preset voltage value, the charging control circuit controls the first switch to be turned on so that the first charging circuit is connected to the first power source through the first switch, and the charger charges the electronic device.

[0008] When the charging control circuit detects that the second voltage value is greater than the second preset voltage value, the charging control circuit controls the first switch to turn off, so that the second terminal of the first charging circuit is disconnected from the first power source, and the first power source stops supplying power to the charger.

[0009] Secondly, this application provides a charger including a first charging circuit, a first switch, and a charging control circuit. A first terminal of the first charging circuit is connected to a first power source, and a second terminal of the first charging circuit is connected to the first power source through the first switch. A first terminal of the charging control circuit is connected to the first charging circuit, and a second terminal of the charging control circuit is connected to the control terminal of the first switch. The charging control circuit is used to control the first switch to be turned on or off.

[0010] Thirdly, embodiments of this application provide an electronic device including a second charging circuit and a battery. The second charging circuit includes a second power supply, a first detection module, and a discharge control module. A first terminal of the second power supply is connected to the charging control circuit, a second terminal of the second power supply is connected to a first terminal of the first detection module, a second terminal of the first detection module is connected to a first terminal of the discharge control module, and a second terminal of the discharge control module is connected to the battery. The battery is connected to a charger.

[0011] In the embodiments of this application, the charging system includes a charger and an electronic device for charging. The charger includes a first charging circuit, a first switch, and a charging control circuit. The electronic device includes a battery, a second power source, a first detection module, and a discharge control module. When the first detection module detects that a first voltage value is equal to a first preset voltage value, it indicates that the electronic device is connected to the charger. The charging control circuit controls the first switch to turn on, connecting the first charging circuit to the first power source, thereby enabling the charger to charge the electronic device. When the charging control circuit detects that a second voltage value is greater than a second preset voltage value, it indicates that the electronic device has been removed from the charger. The charging control circuit controls the first switch to turn off, disconnecting the first charging circuit from the first power source, thereby disconnecting the charger from the first power source. This avoids the harmonics and lightning strikes in the first power source from impacting the charger when the first power source is interfered with or struck by lightning, thus improving the charger's lifespan and ensuring good safety.

[0012] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is one of the structural schematic diagrams of the charging system provided in the embodiments of this application;

[0015] Figure 2 This is a second schematic diagram of the charging system provided in the embodiments of this application;

[0016] Figure 3 This is the third schematic diagram of the charging system provided in the embodiments of this application. Detailed Implementation

[0017] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0018] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The charging system, charger, and electronic device provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0021] like Figure 1 As shown in the figure, this application provides a charging system, which includes a charger 10 and an electronic device 20.

[0022] The charger 10 includes a first charging circuit 110, a first switch 120, and a charging control circuit 130. The first terminal of the first charging circuit 110 is connected to the first power supply 30, and the second terminal of the first charging circuit 110 is connected to the first power supply 30 through the first switch 120. The first terminal of the charging control circuit 130 is connected to the first charging circuit 110, and the second terminal of the charging control circuit 130 is connected to the control terminal of the first switch 120. The charging control circuit 130 is used to control the first switch 120 to be turned on or off.

[0023] The electronic device 20 includes a second charging circuit 210 and a battery 220. The second charging circuit 210 includes a second power supply 211, a first detection module 212, and a discharge control module 213. The first terminal of the second power supply 211 is connected to the charging control circuit 130, the second terminal of the second power supply 211 is connected to the first terminal of the first detection module 212, the second terminal of the first detection module 212 is connected to the first terminal of the discharge control module 213, and the second terminal of the discharge control module 213 is connected to the battery 220. The battery 220 is connected to the first charging circuit 110.

[0024] When the first detection module 212 detects that the first voltage value is equal to the first preset voltage value, the charging control circuit 130 controls the first switch 120 to be turned on, so that the first charging circuit 110 is connected to the first power supply 30 through the first switch 120, and the charger 10 charges the electronic device 20.

[0025] When the charging control circuit 130 detects that the second voltage value is greater than the second preset voltage value, the charging control circuit 130 controls the first switch 120 to turn off, so that the second terminal of the first charging circuit 110 is disconnected from the first power supply 30, and the first power supply 30 stops supplying power to the charger 10.

[0026] In this embodiment, the charging control circuit 130 controls the on / off state of the first switch 120 to control the connection and disconnection between the first charging circuit 110 and the first power supply 30. When the first switch 120 is on, the first charging circuit 110 is connected to the first power supply 30; when the first switch 120 is off, the first charging circuit 110 is disconnected from the first power supply 30. The control structure is simple and easy to implement. This avoids the impact of harmonics and lightning strikes in the first power supply on the charger when the first power supply is interfered with or struck by lightning, thus improving the charger's lifespan and ensuring good safety.

[0027] In this embodiment, the first switch 120 can be a MOSFET, transistor, relay, or other components. This embodiment does not impose any specific limitations on this comparison.

[0028] In this embodiment, the first power source 30 is an AC power source. For example, the first power source 30 can be AC ​​mains power.

[0029] In this embodiment, the charger 10 is used to charge the connected electronic device 20. The charger 10 includes a first charging circuit 110, a first switch 120, and a charging control circuit 130. The charging control circuit 130 controls the on and off of the first switch 120, thereby controlling the connection and disconnection between the first charging circuit 110 and the first power supply 30. The electronic device 20 includes a battery 220, a second power supply 211, a first detection module 212, and a discharge control module 213. When the first detection module 212 detects that a first voltage value is equal to a first preset voltage value, it indicates that the electronic device 20 is connected to the charger 10. The charging control circuit 130 controls the first switch 120 to open and close. When switch 120 is turned on, the first charging circuit 110 is connected to the first power supply 30, enabling the charger 10 to charge the battery 220 of the electronic device 20. When the charging control circuit 130 detects that the second voltage value is greater than the second preset voltage value, it indicates that the electronic device 20 has been removed from the charger 10. Therefore, the charging control circuit 130 controls the first switch 120 to turn off, that is, the first charging circuit 110 is disconnected from the first power supply 30, so that the charger 10 is disconnected from the first power supply 30. This avoids the harmonics and lightning strikes in the first power supply 30 from impacting the charger 10 when the first power supply 30 is interfered with or struck by lightning, thus improving the lifespan of the charger and ensuring good safety.

[0030] In one embodiment, such as Figure 2 and Figure 3 As shown, the first charging circuit 110 includes a first rectifier and filter module 1101, a transformer 1102, a power conversion module 1103, and a second rectifier and filter module 1104. The first end of the first rectifier and filter module 1101 is connected to the first power supply 30, the second end of the first rectifier and filter module 1101 is connected to the first power supply 30 through the first switch 120, the third end of the first rectifier and filter module 1101 is connected to the first end of the primary winding of the transformer 1102, and the fourth end of the first rectifier and filter module 1101 is connected to the second end of the primary winding of the transformer 1102 through the power conversion module 1103. One end of the second rectifier and filter module 1104 is connected to the secondary winding of the transformer 1102, and the other end of the second rectifier and filter module 1104 is used to connect to the battery 220.

[0031] In this embodiment, the first rectifier-filter module 1101 includes a rectifier module 1101-1 and an input energy storage filter module 1101-2. The first end of the rectifier module 1101-1 is the first terminal of the first rectifier-filter module 1101, the second end of the rectifier module 1101-1 is the second terminal of the first rectifier-filter module 1101, the first terminal of the rectifier module 1101-1 is connected to the first power supply 30, the second terminal of the rectifier module 1101-1 is connected to the first power supply 30 through a first switch 120, and the third terminal of the rectifier module 1101-1 is connected to the input energy storage filter module 1101-2. The first terminal is connected to the fourth terminal of the rectifier module 1101-1, which is connected to the second terminal of the input energy storage filter module 1101-2. The third terminal of the input energy storage filter module 1101-2 is the third terminal of the first rectifier filter module 1101, and the fourth terminal of the input energy storage filter module 1101-2 is the fourth terminal of the first rectifier filter module 1101. The third terminal of the input energy storage filter module 1101-2 is connected to the first terminal of the primary winding of the transformer 1102, and the fourth terminal of the input energy storage filter module 1101-2 is connected to the second terminal of the primary winding of the transformer 1102 through the power conversion module 1103.

[0032] In this embodiment, the power conversion module 1103 includes a power MOSFET 1103-1 and a PWM control chip 1103-2. The power MOSFET 1103-1 is connected in series between the fourth terminal of the input energy storage filter module 1101-2 and the second terminal of the primary winding of the transformer 1102. The PWM control chip 1103-2 is used to control the on and off of the power MOSFET 1103-1.

[0033] In this embodiment, the power MOSFET 1103-1 is an NMOS transistor; the PWM control chip 1103-2 is used to control the power MOSFET 1103-1 to turn on and off. The power supply terminal of the PWM control chip 1103-2 is connected to the third terminal of the input energy storage filter module 1101-2 so that the input energy storage filter module 1101-2 supplies power to the PWM control chip 1103-2.

[0034] In this embodiment, during actual use, the drain of the power MOSFET 1103-1 is connected to the second end of the primary winding of the transformer 1102, the source of the power MOSFET 1103-1 is connected to the fourth end of the input energy storage filter module 1101-2, and the gate of the power MOSFET 1103-1 is connected to the PWM control chip 1103-2.

[0035] In this embodiment, it should be noted that the rectifier module 1101-1 is used to convert the low-frequency high-voltage AC power output from the first power supply 30 into low-frequency high-voltage DC power, and output the low-frequency high-voltage DC power to the input energy storage filter module 1101-2; the input energy storage filter module 1101-2 is a high-voltage energy storage filter module, which is used to convert the low-frequency high-voltage DC power output from the rectifier module 1101-1 into relatively stable pulsating DC power, and output the relatively stable pulsating DC power to the transformer 1102; simultaneously, it converts the relatively stable pulsating DC power into relatively stable DC power. Electricity serves as the input voltage for the power conversion module 1103. The transformer 1102 converts the relatively stable pulsating DC power output from the input energy storage filter module 1101-2 into low-frequency, low-voltage DC power, and outputs the low-frequency, low-voltage DC power to the second rectifier and filter module 1104. The second rectifier and filter module 1104 rectifies and filters the low-frequency, low-voltage DC power output from the transformer 1102 to output a charging voltage. The charging voltage can be output through the DC output interface in the charger 10 to charge the electronic device 20 connected to the DC output interface of the charger 10.

[0036] In this embodiment, the DC output interface of the charger 10 includes the third terminal of the second rectifier and filter module 1104 and the first terminal of the protocol logic module 1301.

[0037] In this embodiment of the application, the low-frequency high-voltage AC power output from the first power supply 30 is converted and filtered by the first charging circuit 110, so that the DC output interface of the charger 10 outputs a charging voltage to charge the electronic device 20 connected to the DC output interface of the charger 10.

[0038] In one embodiment, such as Figure 3 As shown, the second rectifier and filter module 1104 includes a rectifier MOSFET 1104-1, a rectifier control chip 1104-2, and an output energy storage filter module 1104-3. The first end of the output energy storage filter module 1104-3 is connected to the first end of the secondary winding of the transformer 1102. The second end of the output energy storage filter module 1104-3 is connected to the second end of the secondary winding of the transformer 1102 through the rectifier MOSFET 1104-1. The third end of the output energy storage filter module 1104-3 is used to connect to the battery 220. The control terminal of the rectifier MOSFET 1104-1 is connected to the rectifier control chip 1104-2.

[0039] In this embodiment, the first end of the output energy storage filter module 1104-3 is one end of the second rectification filter module 1104, the drain of the rectifier MOS transistor 1104-1 is also one end of the second rectification filter module 1104, and the third end of the output energy storage filter module 1104-3 is the other end of the second rectification filter module 1104.

[0040] In this embodiment, the rectifier MOSFET 1104-1 is an NMOS transistor, and the rectifier control chip 1104-2 is used to control the conduction and turn-off of the rectifier MOSFET 1104-1. The source of the rectifier MOSFET 1104-1 is connected to the second terminal of the output energy storage filter module 1104-3, the drain of the rectifier MOSFET 1104-1 is connected to the second terminal of the secondary winding of the transformer 1102, the gate of the rectifier MOSFET 1104-1 is connected to the output terminal of the rectifier control chip 1104-2, and the power supply terminal of the rectifier control chip 1104-2 is connected to the first terminal of the secondary winding of the transformer 1102, so that the low-frequency, low-voltage DC power output from the secondary winding of the transformer 1102 supplies power to the rectifier control chip 1104-2.

[0041] In this embodiment, it should be noted that when the input terminal of the charger 10 is connected to the first power supply 30, the first switch 120 is turned on, and the DC output interface of the charger 10 is connected to the electronic device 20, the power MOSFET 1103-1 is turned on by the PWM control chip 1103-2 to store energy in the primary winding of the transformer 1102. Simultaneously with the power MOSFET 1103-1 being turned on by the PWM control chip 1103-2, the rectifier MOSFET 1104-1 is turned off by the rectifier control chip 1104-2, so that the energy stored in the output energy storage filter module 1104-3 maintains a relatively stable output voltage to charge the electronic device 20. After a preset time interval, the PWM control chip... Chip 1103-2 controls the power MOSFET 1103-1 to turn off. At the same time, the rectifier control chip 1104-2 controls the rectifier MOSFET 1104-1 to turn on. Under the coupling effect of transformer 1102, the energy stored in the primary winding of transformer 1102 is transferred to the secondary winding of transformer 1102, and the rectifier MOSFET 1104-1 charges the electronic device 20. At the same time, the rectifier MOSFET 1104-1 outputs energy to the output energy storage filter module 1104-3 to charge the output energy storage filter module 1104-3, replenishing the energy consumed by the output energy storage filter module 1104-3 in the previous stage when it charged the electronic device 20 alone, thereby realizing continuous charging of electronic device 20.

[0042] In one embodiment, such as Figure 3As shown, the charging control circuit 130 includes a protocol logic module 1301, a feedback module 1302, and a first switch driving module 1303. The first terminal of the protocol logic module 1301 is connected to the first terminal of the second power supply 211, the second terminal of the protocol logic module 1301 is connected to the first terminal of the feedback module 1302, and the protocol logic module 1301 is connected to the first charging circuit 110. The second terminal of the feedback module 1302 is connected to the first terminal of the first switch driving module 1303, and the second terminal of the first switch driving module 1303 is connected to the control terminal of the first switch 120.

[0043] In this embodiment, the charging control circuit 130 includes a protocol logic module 1301, a feedback module 1302, and a first switch driving module 1303. The protocol logic module 1301 is used to detect whether the electronic device 20 is connected to the charger 10, and also to detect the switching state of the first switch 120. When the electronic device 20 is connected to the charger 10 and the first switch 120 is off, it outputs a first signal to the feedback module 1302. When the electronic device 20 is not connected to the charger 10 and the first switch 120 is on, it outputs a second signal to the feedback module 1302. The feedback module 1302 is used to feed back the first signal or the second signal output by the protocol logic module 1301 to the first switch driving module 1303, so that the first switch driving module 1303 controls the first switch 120 to be turned on or off according to the first signal or the second signal.

[0044] In this embodiment, when the protocol logic module 1301 outputs a first signal, it indicates that the electronic device 20 is connected to the charger 10 and the first switch 120 is turned off. In order to charge the electronic device 20, the first switch driving module 1303 needs to control the first switch 120 to turn on. Therefore, the first signal is a signal used to control the first switch 120 to turn on. When the protocol logic module 1301 outputs a second signal, it indicates that the electronic device 20 is not connected to the charger 10 and the first switch 120 is turned on, indicating that the electronic device 20 has been removed from the charger 10. In order to ensure the safe use of the charger 10, the first switch driving module 1303 needs to control the first switch 120 to turn off. Therefore, the second signal is a signal used to control the first switch 120 to turn off.

[0045] In this embodiment, the feedback module 1302 can be an optocoupler isolation module or a magnetic coupler isolation module, and the first switch drive module 1303 can be a controller. This embodiment does not impose any specific limitations.

[0046] In this embodiment, the first end of the first switch 120 is connected to the rectifier module 1101-1, the second end of the first switch 120 is connected to the first power supply 30, and the control end of the first switch 120 is connected to the second end of the first switch drive module 1303.

[0047] In this embodiment, the protocol logic module 1301 detects the switching state of the first switch 120 and the connection state between the electronic device 20 and the charger 10. When the electronic device 20 is connected to the charger 10 and the first switch 120 is off, the protocol logic module 1301 outputs a signal to the first switch driving module 1303 through the feedback module 1302 to control the first switch 120 to turn on. When the electronic device 20 is not connected to the charger 10 and the first switch 120 is on, the protocol logic module 1301 outputs a signal to the first switch driving module 1303 through the feedback module 1302. The signal controlling the first switch 120 to turn off enables the first switch drive module 1303 to control the first switch 120 to turn on and off according to the signal output by the protocol logic module 1301. This enables the charger 10 to charge the electronic device 20 when the charger 10 is connected to the electronic device 20, and disconnects the charger 10 from the first power supply 30 when the charger 10 is not connected to the electronic device 20. This avoids the impact of harmonics and lightning strikes in the AC power grid on the charger 10 when the AC power grid is interfered with or struck by lightning, thus improving the service life of the charger 10 and ensuring good safety.

[0048] In one embodiment, such as Figure 3 As shown, the protocol logic module 1301 includes a third power supply 1301-1, a second detection module 1301-2, and a controller 1301-3; the first terminal of the third power supply 1301-1 is connected to the first terminal of the second power supply 211, the second terminal of the third power supply 1301-1 is connected to the first terminal of the second detection module 1301-2, the second terminal of the second detection module 1301-2 is connected to the first terminal of the controller 1301-3, the second terminal of the controller 1301-3 is connected to the first terminal of the feedback module 1302, and the controller 1301-3 is connected to the first charging circuit 110.

[0049] In this embodiment, the first end of the third power supply 1301-1 is the first end of the protocol logic module 1301, and the second end of the controller 1301-3 is the second end of the protocol logic module 1301.

[0050] In this embodiment, it should be noted that the third terminal of the controller 1301-3 is connected to the second terminal of the secondary winding of the transformer 1102, and the fourth terminal of the controller 1301-3 is connected to the third terminal of the output energy storage filter module 1104-3, so as to supply power to the controller 1301-3 through the output energy storage filter module 1104-3.

[0051] In this embodiment, the second detection module 1301-2 is used to detect the connection status between the electronic device 20 and the charger 10. If the second voltage value detected by the second detection module 1301-2 is greater than the second preset voltage value, it indicates that the electronic device 20 is not connected to the charger 10.

[0052] In this embodiment, the controller 1301-3 is used to detect the switching state of the first switch 120. The third terminal of the controller 1301-3 is connected to the second terminal of the secondary winding of the transformer 1102. When the third terminal of the controller 1301-3 detects a high-level signal, it indicates that current is flowing through the secondary winding of the transformer 1102, and at this time, the first switch 120 is turned on. When the third terminal of the controller 1301-3 detects a low-level signal, it indicates that no current is flowing through the secondary winding of the transformer 1102, and at this time, the first switch 120 is turned off.

[0053] In one embodiment, such as Figure 3 As shown, the third power supply 1301-1 includes a first constant current source module 1301-1-1, a second switch 1301-1-2, a third switch 1301-1-3, and a first resistor 1301-1-4; the first terminal of the second switch 1301-1-2 is connected to the output terminal of the first constant current source module 1301-1-1, the second terminal of the second switch 1301-1-2 is connected to the first terminal of the third switch 1301-1-3, the first terminal of the second detection module 1301-2, and the first terminal of the second power supply 211, respectively, and the second terminal of the third switch 1301-1-3 is grounded through the first resistor 1301-1-4.

[0054] In this embodiment, the second terminal of the second switch 1301-1-2 is the second terminal of the third power supply 1301-1.

[0055] In this embodiment, it should be noted that when the first switch 120 is off, the third switch 1301-1-3 is on and the second switch 1301-1-2 is off. At this time, the first current I1 output by the first constant current source module 1301-1-1 has no receiving path, the second terminal of the second switch 1301-1-2 is grounded through the third switch 1301-1-3 and the first resistor 1301-1-4 connected in series, and the second voltage value V2 detected by the second detection module 1301-2 is 0.

[0056] With the first switch 120 on, the third switch 1301-1-3 off, and the second switch 1301-1-2 on. At this time, the first current I1 output by the first constant current source module 1301-1-1 flows into the second detection module 1301-2 through the second switch 1301-1-2. The second voltage value V2 detected by the second detection module 1301-2 is V... 21 Among them, V21 This is the rated voltage value of the first constant current source module 1301-1-1.

[0057] In one embodiment, such as Figure 3 As shown, the second power supply 211 includes a second constant current source module 2111, a fourth switch 2112, a fifth switch 2113, and a second resistor 2114. The first end of the fourth switch 2112 is connected to the output end of the second constant current source module 2111, and the second end of the fourth switch 2112 is connected to the first end of the fifth switch 2113, the first end of the first detection module 212, and the charging control circuit 130, respectively. The second end of the fifth switch 2113 is grounded through the second resistor 2114.

[0058] In this embodiment, the second end of the fourth switch 2112 is connected to the first end of the fifth switch 2113, the first end of the first detection module 212, and the second end of the second switch 1301-1-2 in the charging control circuit 130.

[0059] In this embodiment, it should be noted that when the electronic device 20 is not connected to the charger 10, the fourth switch 2112 and the fifth switch 2113 inside the second power supply 211 of the electronic device 20 are turned on in turn.

[0060] When electronic device 20 is not connected to charger 10 and fourth switch 2112 is on, the second current I2 output by second constant current source module 2111 flows into first detection module 212 through fourth switch 2112, and the first voltage value V1 detected by first detection module 212 is V 11 Among them, V 11 This is the rated voltage value of the second constant current source module 2111;

[0061] When the electronic device 20 is not connected to the charger 10 and the fifth switch 2113 is turned on, the second current I2 output by the second constant current source module 2111 has no receiving path, and the first voltage value V1 detected by the first detection module 212 is 0.

[0062] In this application, when using the charger 10 in the system to charge the electronic device 20, the main steps include 401-403.

[0063] Step 401: Connect the charger 10 to the first power supply 30, but do not connect the charger 10 to the electronic device 20. When the charger 10 is connected to the first power supply 30 but not to the electronic device 20, the first switch 120 and the second switch 1301-1-2 in the charger 10 are both off, the third switch 1301-1-3 in the charger 10 is on, the second current I1 output by the first constant current source module 1301-1-1 has no receiving path, and the second voltage value V2 detected by the second detection module 1301-2 is 0. The fourth switch 2112 and the fifth switch 2113 in the electronic device 20 are alternately on. When the fourth switch 2112 is on, the first voltage value V1 detected by the first detection module 212 is V... 11 When the fifth switch 2113 is turned on, the first voltage value V1 detected by the first detection module 212 is 0.

[0064] Step 402: Connect the DC input interface of the electronic device 20 to the DC output interface of the charger 10 to connect the charger 10 to the electronic device 20.

[0065] Step 4021: In the initial stage of connecting the charger 10 and the electronic device 20, the fourth switch 2112 and the fifth switch 2113 of the electronic device 20 are still turned on alternately. When the fourth switch 2112 of the electronic device 20 is turned on, since the second terminal of the fourth switch 2112 is connected to the second terminal of the second switch 1301-1-2, the second current I2 output by the second constant current source module 2111 flows through the fourth switch 2112, the third switch 1301-1-3 and the first resistor 1301-1-4 to ground. At this time, the first voltage value V1 detected by the first detection module 212 in the electronic device 20 is V1 = I2 × R1 = V 12 =V 10 Where R1 is the resistance value of the first resistor 1301-1-4, V 10 The first preset voltage value is V. 10 The voltage V is less than the rated voltage value of the first constant current source module 1301-1-1. 11 ;

[0066] Step 4022: The first voltage value V1 detected by the first detection module 212 in the electronic device 20 is equal to the first preset voltage value V. 10 In the case of this, the first detection module 212 controls the discharge control module 213 to work, and the discharge control module 213 controls the battery 220 to reverse charge the output energy storage filter module 1104-3 of the charger 10.

[0067] Step 4023: When the battery 220 is reverse charging the output energy storage filter module 1104-3 of the charger 10, the energy storage filter module 1104-3 supplies power to the protocol logic module 1301, and the protocol logic module 1301 starts to work.

[0068] Step 4024: The switch state of the first switch 120 is detected by the third terminal of the controller 1301-3 in the protocol logic module 1301. Since the first switch 120 is off, the controller 1301-3 detects a low-level signal. Therefore, the protocol logic module 1301 outputs a first signal to the first switch drive module 1303 through the feedback module 1302.

[0069] Step 4025: When the first switch driving module 1303 receives the first signal, the first switch driving module 1303 controls the first switch 120 to be turned on, and at the same time controls the third switch 1301-1-3 to be turned off, and the second switch 1301-1-2 to be turned on.

[0070] Step 4026: Because the third switch 1301-1-3 is turned off, the first voltage value V1 detected by the first detection module 212 is greater than the first preset voltage value V. 10 The first voltage value V1 detected by the first detection module 212 is greater than the first preset voltage value V. 10 In this case, the fourth switch 2112 of the control electronic device 20 is turned off and the fifth switch 2113 is turned on; at the same time, the control discharge control module 213 stops working and the battery 220 enters the charging preparation state.

[0071] Step 4027: Charge the battery 220 of the electronic device 20 using the charger 10; wherein, during the charging process of the battery 220 by the charger 10, the second current I1 output by the first constant current source module 1301-1-1 flows through the second switch 1301-1-2, the fifth switch 2113, and the second resistor 2114 to ground, and the second voltage value V2 detected by the second detection module 1301-2 is V2 = I1 × R2 = V 22 =V 20 Where R2 is the resistance of the second resistor 2114, V 20 The second preset voltage value;

[0072] Step 403: Remove the electronic device 20 connected to the charger 10; wherein, when the electronic device 20 is removed, the second resistor 2114 is removed along with the electronic device 20, and the second voltage value V2 = V detected by the second detection module 1301-2 is... 21Simultaneously, the controller 1301-3 detects a high-level signal, indicating that the electronic device 20 has been removed, but the charger 10 is still connected to the first power supply 30. At this time, the protocol logic module 1301 outputs a second signal to the first switch drive module 1303 through the feedback module 1302. Upon receiving the first signal, the first switch drive module 1303 controls the first switch 120 to turn off, disconnecting the charger 10 from the first power supply 30. The second preset voltage value V... 20 The voltage V is less than the rated voltage value of the first constant current source module 1301-1-1. 21 .

[0073] Optionally, embodiments of this application also provide a charger.

[0074] like Figure 1 As shown, the charger 10 includes a first charging circuit 110, a first switch 120, and a charging control circuit 130. The first end of the first charging circuit 110 is connected to the first power supply 30, and the second end of the first charging circuit 110 is connected to the first power supply 30 through the first switch 120. The first end of the charging control circuit 130 is connected to the first charging circuit 110, and the second end of the charging control circuit 130 is connected to the control end of the first switch 120. The charging control circuit 130 is used to control the first switch 120 to be turned on or off.

[0075] Optionally, embodiments of this application also provide an electronic device.

[0076] like Figure 1 As shown, the electronic device 20 includes a second charging circuit 210 and a battery 220. The second charging circuit 210 includes a second power supply 211, a first detection module 212, and a discharge control module 213. The first terminal of the second power supply 211 is connected to the charging control circuit 130, the second terminal of the second power supply 211 is connected to the first terminal of the first detection module 212, the second terminal of the first detection module 212 is connected to the first terminal of the discharge control module 213, and the second terminal of the discharge control module 213 is connected to the battery 220. The battery 220 is connected to the charger.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] Although embodiments of the invention have been shown and described, those skilled in the art will recognize that various modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A charging system, characterized in that, Including chargers and electronic devices; The charger includes a first charging circuit, a first switch, and a charging control circuit. A first terminal of the first charging circuit is connected to a first power source, and a second terminal of the first charging circuit is connected to the first power source through the first switch. A first terminal of the charging control circuit is connected to the first charging circuit, and a second terminal of the charging control circuit is connected to the control terminal of the first switch. The charging control circuit is used to control the first switch to be turned on or off. The electronic device includes a second charging circuit and a battery. The second charging circuit includes a second power supply, a first detection module, and a discharge control module. A first terminal of the second power supply is connected to the charging control circuit. A second terminal of the second power supply is connected to a first terminal of the first detection module. A second terminal of the first detection module is connected to a first terminal of the discharge control module. A second terminal of the discharge control module is connected to the battery. The battery is connected to the first charging circuit. When the first detection module detects that the first voltage value is equal to the first preset voltage value, the charging control circuit controls the first switch to be turned on so that the first charging circuit is connected to the first power source through the first switch, and the charger charges the electronic device. When the charging control circuit detects that the second voltage value is greater than the second preset voltage value, the charging control circuit controls the first switch to turn off, so that the second terminal of the first charging circuit is disconnected from the first power supply, and the first power supply stops supplying power to the charger. The charging control circuit includes a protocol logic module, a feedback module, and a first switch drive module; The first end of the protocol logic module is used to connect to the first end of the second power supply, the second end of the protocol logic module is connected to the first end of the feedback module, and the protocol logic module is used to connect to the first charging circuit. The second end of the feedback module is connected to the first end of the first switch driving module, and the second end of the first switch driving module is connected to the control end of the first switch.

2. The charging system according to claim 1, characterized in that, The first charging circuit includes a first rectifier and filter module, a transformer, a power conversion module, and a second rectifier and filter module; The first end of the first rectifier and filter module is connected to the first power supply, the second end of the first rectifier and filter module is connected to the first power supply through the first switch, the third end of the first rectifier and filter module is connected to the first end of the primary winding of the transformer, and the fourth end of the first rectifier and filter module is connected to the second end of the primary winding of the transformer through the power conversion module. One end of the second rectifier and filter module is connected to the secondary winding of the transformer, and the other end of the second rectifier and filter module is used to connect to the battery.

3. The charging system according to claim 2, characterized in that, The second rectifier and filter module includes a rectifier MOSFET, a rectifier control chip, and an output energy storage filter module; The first end of the output energy storage filter module is connected to the first end of the secondary winding of the transformer. The second end of the output energy storage filter module is connected to the second end of the secondary winding of the transformer through the rectifier MOSFET. The third end of the output energy storage filter module is used to connect to the battery. The control end of the rectifier MOSFET is connected to the rectifier control chip.

4. The charging system according to claim 1, characterized in that, The protocol logic module includes a third power supply, a second detection module, and a controller; The first end of the third power supply is used to connect to the first end of the second power supply, the second end of the third power supply is connected to the first end of the second detection module, the second end of the second detection module is connected to the first end of the controller, the second end of the controller is connected to the first end of the feedback module, and the controller is used to connect to the first charging circuit.

5. The charging system according to claim 4, characterized in that, The third power supply includes a first constant current source module, a second switch, a third switch, and a first resistor; The first terminal of the second switch is connected to the output terminal of the first constant current source module, and the second terminal of the second switch is connected to the first terminal of the third switch, the first terminal of the second detection module, and the first terminal of the second power supply, respectively. The second terminal of the third switch is grounded through the first resistor.

6. The charging system according to claim 1, characterized in that, The second power supply includes a second constant current source module, a fourth switch, a fifth switch, and a second resistor; The first end of the fourth switch is connected to the output end of the second constant current source module, the second end of the fourth switch is connected to the first end of the fifth switch, the first end of the first detection module, and the charging control circuit, and the second end of the fifth switch is grounded through the second resistor.

7. A charger, characterized in that, It includes a first charging circuit, a first switch, and a charging control circuit. A first terminal of the first charging circuit is used to connect to a first power source, and a second terminal of the first charging circuit is connected to the first power source through the first switch. A first terminal of the charging control circuit is connected to the first charging circuit, and a second terminal of the charging control circuit is connected to the control terminal of the first switch. The charging control circuit is used to control the first switch to be turned on or off. The charging control circuit includes a protocol logic module, a feedback module, and a first switch drive module. The first terminal of the protocol logic module is used to connect to the first terminal of the second power supply of the second charging circuit of the electronic device, the second terminal of the protocol logic module is connected to the first terminal of the feedback module, and the protocol logic module is used to connect to the first charging circuit. The second end of the feedback module is connected to the first end of the first switch driving module, and the second end of the first switch driving module is connected to the control end of the first switch.

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